PTFE Syringe Filter sterile, hydrophilic, Pore Size : 0.45μm, Diameter : 30mm, 100/P, 180.00 $, Request Quotes ; PTFE Syringe Filter glass fiber, hydrophilic, EZFlow® Hydrophobic PTFE Syringe Filters – Foxx Life Sciences. The filter is best made with its Hydrophobic PTFE membrane and ideally used before analytical such as HPLC, IC, and GC.